![]() The function of these projections was not known at that time. They were named protoplasmic projections by Golgi. Historical Factsĭendrites were first studied by Golgi in 1873 who proposed them to be the projections of protoplasm found in the neurons. These structures are considered to play an important role in neural plasticity for adaptation, learning, and memory. These serve as the initial sites for the processing of information received by the synapse. They are composed of actin filaments and are highly plastic.ĭendritic spines are abundantly present in the neurons of the cerebral cortex. These structures are visible on dendrites upon silver staining. Most of the synapses impinge on these dendritic spines. They occur at regular intervals along the length of dendrites. These are the short blunt structures associated with dendrites. Unlike axons, they have a variable diameter or thickness that decreases as the branching proceeds. As the dendrites branch, their thickness goes on decreasing. The branching pattern of dendrites is also different among different neurons. They show multiple branching or arborization. The size and thickness of dendrites vary among different types of neurons. The membrane of dendrites has abundant receptors where the neurotransmitters released at the synapse attach and initiate an action potential in the neuron. It is rich in cytoskeletal components that provide structural support to the dendrites. The cytoplasm of dendrites has the same composition as found in the cell body of neurons. They have varying shapes and structures among different neurons found in the central as well as the peripheral nervous system. Structure and Historyĭendrites are the cytoplasmic projections of neurons. We will also study different functions performed by dendrites as well as their clinical importance. In this article, we will talk about the structure of dendrites, their embryologic development, their metabolism, and different scheme of dendrites arborization. Dendrites are the cellular processes that carry nerve impulses towards the cell bodies of neurons. The cellular processes of neurons are divided into two categories based on the direction of nerve impulses. Nerve impulses travel along with these cellular processes of the neurons. These neurons have a cell body with radiating cellular processes. It is comprised of millions of neurons that are responsible for carrying messages in the form of nerve impulses from one part of the body to the other. What happens when dendrites are damaged?Ĭoordination among the different organs and organ systems in the body of animals is brought about by the nervous system.What is the difference between axons and dendrites?.Factors Controlling Dendritic Development. ![]()
0 Comments
Leave a Reply. |